<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="http://unpkg.com/vue@3/dist/vue.global.js"></script>
</head>

<body>
    <div id="app">
        <p>{{message}}</p>
    </div>
    <script>
        const vm = Vue.createApp({
            setup() {
                return {
                    message: "hello world"
                }
            }
        }).mount("#app")
    </script>
</body>

</html>